Protection of paper sheets of the contract from the substitution of text
In my work, I didn’t have to deal with a situation when one of the Parties would unfairly change pages in a multi-page document (contract, inspection report) and then tried to somehow use it for their own benefit. But this is possible and morally I am preparing for it.
In general, for contracts there are classic ways to protect against sheet substitution, these are:
- use of forms with protection (watermarks, etc.)
- initialing (signing each side of each page of the document)
- sighting (stamp or signature usually one side on each sheet)
- flashing
But all these methods require some additional costs or effort. Well, what's normal for a multi-million dollar contract is not always appropriate for a 20 thousand contract. Therefore, I would like to find some kind of modern solution to this problem that would be in keeping with the spirit of the times.
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The task is to protect oneself technologically from replacing the contents of the sheets, in a multipage document, where the signatures are put only on the last page.
And that it would be faster and easier than five people to sign each page in a document on 20 pages, in five copies.
My idea is this:
When printing a document, each page is analyzed for the density and location of the text, then a qr-code or barcode is generated, which is located at the bottom of the page below the text. On the last page is printed code, the sum of all codes. The last page is not analyzed, because she will be "authenticated" with live signatures.
If there are any doubts about the “integrity” of the document, the smartphone takes photographs of all the pages of the document, the application re-analyzes the composition of the page and checks its compliance with the qr-code at the bottom of the page, and then checks the compliance of their amount with the latest qr-code.
This method is certainly not perfect, and perhaps protects only from adding or deleting entire paragraphs of text. To improve the accuracy of the comparison, it is already necessary that a smartphone be able to recognize the text on each page almost unmistakably, as far as it’s real for an average-value smartphone now, I don’t know.
For a commercial product, the idea is most likely rather weak, but for a coursework or diploma, it is completely, I think.
In general, for contracts there are classic ways to protect against sheet substitution, these are:
- use of forms with protection (watermarks, etc.)
- initialing (signing each side of each page of the document)
- sighting (stamp or signature usually one side on each sheet)
- flashing
But all these methods require some additional costs or effort. Well, what's normal for a multi-million dollar contract is not always appropriate for a 20 thousand contract. Therefore, I would like to find some kind of modern solution to this problem that would be in keeping with the spirit of the times.
')
The task is to protect oneself technologically from replacing the contents of the sheets, in a multipage document, where the signatures are put only on the last page.
And that it would be faster and easier than five people to sign each page in a document on 20 pages, in five copies.
My idea is this:
When printing a document, each page is analyzed for the density and location of the text, then a qr-code or barcode is generated, which is located at the bottom of the page below the text. On the last page is printed code, the sum of all codes. The last page is not analyzed, because she will be "authenticated" with live signatures.
If there are any doubts about the “integrity” of the document, the smartphone takes photographs of all the pages of the document, the application re-analyzes the composition of the page and checks its compliance with the qr-code at the bottom of the page, and then checks the compliance of their amount with the latest qr-code.
This method is certainly not perfect, and perhaps protects only from adding or deleting entire paragraphs of text. To improve the accuracy of the comparison, it is already necessary that a smartphone be able to recognize the text on each page almost unmistakably, as far as it’s real for an average-value smartphone now, I don’t know.
For a commercial product, the idea is most likely rather weak, but for a coursework or diploma, it is completely, I think.
Source: https://habr.com/ru/post/235833/
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